Remove unused Maven plugins

pom.xml

@@ -106,11 +106,6 @@
           <artifactId>frontend-maven-plugin</artifactId>
           <version>1.3</version>
         </plugin>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-antrun-plugin</artifactId>
-          <version>1.7</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-assembly-plugin</artifactId>
@@ -141,11 +136,6 @@
           <artifactId>maven-enforcer-plugin</artifactId>
           <version>1.4</version>
         </plugin>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-failsafe-plugin</artifactId>
-          <version>2.18.1</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-gpg-plugin</artifactId>
@@ -179,11 +169,6 @@
           <artifactId>maven-jxr-plugin</artifactId>
           <version>2.5</version>
         </plugin>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-plugin-plugin</artifactId>
-          <version>3.3</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-release-plugin</artifactId>
@@ -199,11 +184,6 @@
           <artifactId>maven-shade-plugin</artifactId>
           <version>2.3</version>
         </plugin>
-        <plugin>
-          <groupId>org.apache.maven.plugins</groupId>
-          <artifactId>maven-site-plugin</artifactId>
-          <version>3.4</version>
-        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-source-plugin</artifactId>